Most Emission-Efficient Bulk Carriers

Ships ranked by AER (Annual Efficiency Ratio) — grams of CO₂ emitted per tonne of deadweight carried one nautical mile (g CO₂/dwt·nm), the IMO carbon-intensity metric behind the CII rating — from official EU MRV emissions data for reporting year 2025. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2025)

#1,313 of 3,436 bulk carriers

CO₂ intensity

4.0 g CO₂/dwt·nm

vs segment average (4.71)

-15% greener

Bulk Carrier Container Ship Oil Tanker Chemical Tanker Gas Carrier LNG Carrier General Cargo Vehicle Carrier Refrigerated Cargo Ro-Ro Cargo

Sort 🌱 Greenest first 🔧 Least efficient first — retrofit candidates

Size (DWT)

All sizes < 25,000 DWT 25k – 60k DWT 60k – 100k DWT 100k – 200k DWT > 200,000 DWT

Year

2025 2024

3,507

vessels ranked

1.74

greenest (g CO₂/t·nm)

4.46

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
1302	FARMER IMO 9589267	81,541	2012	229 m	Doosan - 6S60MC-C	4.0	B
1301	IOKASTI GS IMO 9748722	55,857	2016	190 m	Kawasaki - 6S50MC-C8	4.0	B
1306	NAVIOS AVIOR IMO 9590084	81,355	2012	229 m	MAN - 6S60MC	4.0	B
1305	BULK ENDURANCE IMO 9782003	60,000	2017	199 m	MAN - 6S50ME-B9	4.0	B
1307	ARUNA CENGIZ IMO 9552331	58,677	2012	197 m	Kawasaki - 6S50MC-C	4.0	B
1304	OGBA IMO 9724001	63,488	2015	200 m	MAN - 5S60ME-C8	4.0	B
1312	AOM GAIA IMO 9623702	82,009	2014	229 m	MAN - 6S60MC-C	4.0	B
1303	AH GLOBE IMO 9294111	74,432	2005	225 m	Hudong Heavy Machinery - MISSION TM OC	4.0	B
1311	EQUINOX ORENDA IMO 9572082	58,689	2012	197 m	MAN - 6S50MC-C	4.0	B
1310	GREEN K-MAX 3 IMO 9838072	80,883	2020	229 m	MAN - 6S60ME-C8	4.0	B
1309	PORT VERA CRUZ IMO 9759680	63,558	2014	200 m	Mitsui - 6S50ME-B9	4.0	B
1308	GENCO MAGIC IMO 9707364	63,497	2014	200 m	MAN - 5S60ME-C8	4.0	B
1314	AMIS CHAMPION IMO 9636369	60,830	2014	200 m	MAN - 6S50MC-C	4.0	B
1313	ZHENG HENG IMO 9593799	81,948	2012	229 m	MAN - 5S60ME-C8	4.0	B
1318	DESERT GRACE IMO 9849502	63,553	2019	200 m	MAN - 6S50MC-B9	4.0	B
1320	WEN ZHU HAI IMO 9488475	76,381	2008	225 m	Hudong Heavy Machinery - 6 S 60 MC	4.0	B
1317	ELWAY IMO 9591806	81,911	2012	229 m	Doosan - 5S60MC-C	4.0	B
1323	DESERT PIONEER IMO 9899193	61,000	2019	200 m	MAN - 7G50ME-C9	4.0	B
1322	GOLDEN OPAL IMO 9470404	74,232	2017	225 m	MAN - 5S60MC-C	4.0	B
1321	TRANS AFRICA IMO 9768239	81,271	2017	229 m	Hudong Heavy Machinery - 6S60ME-C8	4.0	B
1316	THOR CHAIYO IMO 9403140	58,731	2008	190 m	MAN - 6S50MC-C	4.0	B
1315	THETIS IMO 9738208	63,500	2015	200 m	Hudong Heavy Machinery - 5S60ME-C8 Tier II	4.0	B
1319	AC OREN IMO 9491214	56,877	2010	190 m	Doosan - 6S50MC-C	4.0	B
1324	ATHINA III IMO 9247285	73,305	2004	225 m	Hitachi - 7S50MC-C	4.0	B
1330	MITSOS IMO 9637210	63,526	2013	200 m	Hyundai - 5S60ME-C8.2 (Tier II)	4.0	B
1340	STAR GROTON IMO 9575242	63,301	2013	200 m	Hyundai - 5S60ME-C8	4.0	B
1329	ULUSOY-12 IMO 9586423	79,403	2011	229 m	Wärtsilä - 7RT-flex50	4.0	B
1338	MAGIC MARS IMO 9691400	76,822	2014	223 m	Hyundai - 5S60ME-C8	4.0	B
1337	INTHIRA NAREE IMO 9732199	63,800	2014	200 m	JIANGSU ANTAI POWER MACHINERY CO., LTD. JAD-MAN-5S60ME-C8	4.0	B
1328	THOR COURAGE IMO 9440978	58,693	2009	190 m	Mitsui - 7 S 50 MC-C	4.0	B
1335	N AMALTHIA IMO 9364277	75,356	2006	225 m	MAN - 6S60MC	4.0	B
1334	GRIZZLY IMO 9659232	81,394	2013	229 m	Doosan - 6S60MC-C	4.0	B
1333	SAKIZAYA UNICORN IMO 9892676	82,527	2021	229 m	MAN - 6S60ME-C8	4.0	B
1332	WESTERN STABAEK IMO 9989273	40,553	2024	180 m	Yichang Marine Diesel Engine Co Ltd - China 5S50ME-C9-HPSCR	4.0	B
1331	BUZLUDJA IMO 9835783	47,110	2019	190 m	MAN - 5G50ME-C9	4.0	B
1327	SYROS I IMO 9597800	81,393	2011	229 m	Hyundai - 7S50MC-C8	4.0	B
1326	TIGER SOUTH IMO 9619854	76,255	2013	225 m	Wärtsilä - 5RT-flex58T	4.0	B
1339	MENELAOS IMO 9696436	63,458	2015	200 m	MAN - 5S60ME-C8	4.0	B
1325	NORTHERN VENTURE IMO 9978779	64,636	2024	200 m	MAN-B&W 6S50ME-C9	4.0	B
1336	PACIFIC VICTORY IMO 9731896	63,507	2017	200 m	Hudong Heavy Machinery - 5S60ME-C8	4.0	B
1350	LUCKY EFFIE IMO 9288461	76,498	2005	225 m	MAN - 7S50MC-C	4.0	B
1349	LINDEN ARROW IMO 9552953	55,861	2013	190 m	Kawasaki - 5S50MC-C-MK7	4.0	B
1348	GALIO IMO 9633408	81,404	2013	229 m	STX - 7 S 50 MC-C	4.0	B
1347	RG LUNA IMO 9592082	82,296	2013	229 m	MAN - 5S60ME-C	4.0	B
1346	SINCERE SMART IMO 9311177	75,884	2007	225 m	Mitsui - 6S60MC	4.0	B
1345	AKOUR II IMO 9454084	58,831	2010	197 m	MAN - 6S50MC-C	4.0	B
1344	LAGUNA SECA IMO 9737606	81,966	2017	229 m	DALIAN MARINE - 6S60ME-C8	4.0	B
1343	SKIATHOS IMO 9497402	79,412	2011	229 m	MAN - 7S50MC-C8	4.0	B
1342	GW ALPHA IMO 9738820	61,186	2015	200 m	Hitachi - 6S50ME-B9.3TII	4.0	B
1341	ULTRA QUALITY IMO 9866524	63,465	2020	200 m	Mitsui - 6S50ME-B9	4.0	B

Page 27 of 69 — 3,436 vessels

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Engine intelligence

Which engines power the greenest fleets?

The main engine is the single largest CO₂ source on board — typically well over 80% of a ship's emissions come from propulsion. We aggregated this ranking the other way around: every engine design is scored by the measured carbon intensity of the vessels carrying it, licensee-built units merged under their design brand. The verdict from the 2025 data — modern dual-fuel designs like MAN B&W's ME-GI and WinGD's X-DF families, together with EGR/SCR-abated and ultra-long-stroke G-type engines, consistently power the most emission-friendly ships in service.

Emission-friendly engine ranking

AER (Annual Efficiency Ratio) = annual CO₂ emissions ÷ (deadweight × distance sailed), the IMO carbon-intensity metric used for CII ratings. It is built only from measured CO₂, distance and deadweight — not the self-reported cargo transport-work figure, which is unreliable. Implausible outliers (top 2% per segment) are excluded. Grade A–E reflects each vessel's rank within its segment. Source: EMSA THETIS-MRV.